Evolution Lecture 18 - Chapter 12 Topics for today 1. What is the
... 1. What is the difference between natural selection and evolution? 2. Modes of natural selection 3. Genetical theory of natural selection Scenario 1 – traits are genetically based Natural selection occurs • Interaction between phenotypes and the environment resulting in fitness differences Evolution ...
... 1. What is the difference between natural selection and evolution? 2. Modes of natural selection 3. Genetical theory of natural selection Scenario 1 – traits are genetically based Natural selection occurs • Interaction between phenotypes and the environment resulting in fitness differences Evolution ...
Genetics Homework Packet
... codes for a defective enzyme that cannot make the pigment. A mouse that has the genotype bb will have white fur because it lacks the enzyme that makes the black pigment. But a mouse that has the genotype BB or Bb will have black fur because it possesses the enzyme that makes the black pigment. Altho ...
... codes for a defective enzyme that cannot make the pigment. A mouse that has the genotype bb will have white fur because it lacks the enzyme that makes the black pigment. But a mouse that has the genotype BB or Bb will have black fur because it possesses the enzyme that makes the black pigment. Altho ...
Punnett Squares Lesson Plan
... said to be heterozygous. Circle the homozygous offspring on your last Punnett Square. Put a square around the heterozygous offspring on your last Punnett Square. Elaboration, Extension: Point 14: Rules are meant to be broken. Remember, H dominates over h when an organism’s geneotype is Hh. Sometimes ...
... said to be heterozygous. Circle the homozygous offspring on your last Punnett Square. Put a square around the heterozygous offspring on your last Punnett Square. Elaboration, Extension: Point 14: Rules are meant to be broken. Remember, H dominates over h when an organism’s geneotype is Hh. Sometimes ...
Sex-Linked Inheritance (framework) West Coast 2015
... 1) Understand how genes and chromosomes relate to traits. 2) Appreciate how traits are passed from parents to offspring. 3) Comprehend the inheritance of genetic disorders. Learning Objectives: 1) Be able to diagram a single-trait sex-linked cross and calculate genotypic/phenotypic ratios. 2) Determ ...
... 1) Understand how genes and chromosomes relate to traits. 2) Appreciate how traits are passed from parents to offspring. 3) Comprehend the inheritance of genetic disorders. Learning Objectives: 1) Be able to diagram a single-trait sex-linked cross and calculate genotypic/phenotypic ratios. 2) Determ ...
Characteristic passed from parent to offspring
... Characteristic passed from parent to offspring? ...
... Characteristic passed from parent to offspring? ...
POPULATION GENETICS – 3/27/07
... 1. Natural selection is the interaction between the environment and (individuals), which vary in heritable traits. 2. Evolution occurs at the level of the (population). 3. In microevolution, a population—a localized group of organisms of the same species—is studied by looking at their gene pool, or ...
... 1. Natural selection is the interaction between the environment and (individuals), which vary in heritable traits. 2. Evolution occurs at the level of the (population). 3. In microevolution, a population—a localized group of organisms of the same species—is studied by looking at their gene pool, or ...
Assessment Schedule 2010 AS 90459 (Biology 2.3) Describe
... several breedings eg if no solid red (bbww) pigs occur in the large numbers of offspring, then the suspect pig is (almost certainly) bbWW so pure breeding. Answer supported with correct Punnet Squares of crosses (bbWw x bbww and bbWW x bbww) to show the probability of getting white banded and solid ...
... several breedings eg if no solid red (bbww) pigs occur in the large numbers of offspring, then the suspect pig is (almost certainly) bbWW so pure breeding. Answer supported with correct Punnet Squares of crosses (bbWw x bbww and bbWW x bbww) to show the probability of getting white banded and solid ...
X-LINKED INHERITANCE
... All individuals carry several single alleles for genetic diseases Close relatives have more genes in common than unrelated individuals higher chance of inbred parents have the same disease alleles higher risk for their child inherits homozygous for a recessive disease ...
... All individuals carry several single alleles for genetic diseases Close relatives have more genes in common than unrelated individuals higher chance of inbred parents have the same disease alleles higher risk for their child inherits homozygous for a recessive disease ...
17.2 McClintock Found That Chromosomes of Corn
... cells, which continue to divide and grow as the kernel becomes larger. This process produces a sectoring phenotype—patches of cells occur in the kernel that are red, shrunken, and waxy. By analyzing many kernels, McClintock was also able to identify cases in which Ds had moved to a new location. For ...
... cells, which continue to divide and grow as the kernel becomes larger. This process produces a sectoring phenotype—patches of cells occur in the kernel that are red, shrunken, and waxy. By analyzing many kernels, McClintock was also able to identify cases in which Ds had moved to a new location. For ...
Traits and Families
... b. Random chance determines which of the two genes is passed to each offspring. ...
... b. Random chance determines which of the two genes is passed to each offspring. ...
4th Exam is Thursday, December 9
... Because the number of possible genotypes is so large, at any given time, a population will only represent a small fraction of the possible genotypes. Mendelian assortment and recombination produce new allele combinations, but do not produce new alleles. ...
... Because the number of possible genotypes is so large, at any given time, a population will only represent a small fraction of the possible genotypes. Mendelian assortment and recombination produce new allele combinations, but do not produce new alleles. ...
Inheritance Intro
... In animals, meiosis produces ova in females and sperm cells in males. In plants the gametes produced by meiosis are pollen grains and ovules. ...
... In animals, meiosis produces ova in females and sperm cells in males. In plants the gametes produced by meiosis are pollen grains and ovules. ...
Name_____________ ______ Due Date: Biology MCA Q3 Exam
... 13. In humans, being color-blind is a recessive, sex-linked trait. Show the results of a cross between a color-blind woman and a normal man. Include the genotypes of the parents, the punnett square, and the genotypes and phenotypes of the offspring (including %). ...
... 13. In humans, being color-blind is a recessive, sex-linked trait. Show the results of a cross between a color-blind woman and a normal man. Include the genotypes of the parents, the punnett square, and the genotypes and phenotypes of the offspring (including %). ...
Generation 1
... actually be of opposite sexes, but one must play the role of mother (double X chromosome) and the other must play the role of father (XY chromosome). The chromosomes will be separated according to Mendel’s law of independent assortment. The genetic codes that are passed on to the babies will be reco ...
... actually be of opposite sexes, but one must play the role of mother (double X chromosome) and the other must play the role of father (XY chromosome). The chromosomes will be separated according to Mendel’s law of independent assortment. The genetic codes that are passed on to the babies will be reco ...
genetic conditions
... conditions. This means that a single gene (or pair of alleles) controls the condition. For this mode of inheritance two copies of the undesirable allele need to be present before the condition is seen; in which case you may get an abnormal calf. A more common example of a trait with a simple recessi ...
... conditions. This means that a single gene (or pair of alleles) controls the condition. For this mode of inheritance two copies of the undesirable allele need to be present before the condition is seen; in which case you may get an abnormal calf. A more common example of a trait with a simple recessi ...
study of inherited traits
... Note: your cells undergo asexual reproduction—make new blood cells, skin cells, sex cells (mitosis) ...
... Note: your cells undergo asexual reproduction—make new blood cells, skin cells, sex cells (mitosis) ...
Define Chromatin: Histones: Sister chromatids: Centromere
... 26. What is Mendel’s Law of Segregation (Mendel’s First Law)? 27. What is a test cross? 28. What phenotypic and genotypic ratios can be expected in the F1 and F2 generations from a monohybrid cross between homozygous dominant and homozygous recessive individuals in the P generation? (WW x ww) Show t ...
... 26. What is Mendel’s Law of Segregation (Mendel’s First Law)? 27. What is a test cross? 28. What phenotypic and genotypic ratios can be expected in the F1 and F2 generations from a monohybrid cross between homozygous dominant and homozygous recessive individuals in the P generation? (WW x ww) Show t ...
Unit 5 - Notes
... 9. Which of the following sets would represent Mendel’s Parent (P) generation? a) RR x RR b) Rr x Rr c) RR x rr 10. When two different alleles occur together, such as R r, the one that is expressed is a) dominant b) recessive ...
... 9. Which of the following sets would represent Mendel’s Parent (P) generation? a) RR x RR b) Rr x Rr c) RR x rr 10. When two different alleles occur together, such as R r, the one that is expressed is a) dominant b) recessive ...
TT - Lyndhurst Schools
... likelihood of inheriting particular traits. This can help plant and animal breeders in developing varieties that have more desirable qualities. It can also help people explain and predict patterns of inheritance in family lines. One of the easiest ways to calculate the mathematical probability of in ...
... likelihood of inheriting particular traits. This can help plant and animal breeders in developing varieties that have more desirable qualities. It can also help people explain and predict patterns of inheritance in family lines. One of the easiest ways to calculate the mathematical probability of in ...
Gene: A part on the chromosomes that holds the information for a
... Each chromosome in the pair contains genes for the same biological features, such as eye color, at the same locations on the chromosome. However, each can contain either the same allele (e.g., both alleles for blue eyes) or different alleles (e.g., one allele for blue eyes and one allele for br ...
... Each chromosome in the pair contains genes for the same biological features, such as eye color, at the same locations on the chromosome. However, each can contain either the same allele (e.g., both alleles for blue eyes) or different alleles (e.g., one allele for blue eyes and one allele for br ...
Chapter 14: Mendel and the Gene Idea
... • Advantages of pea plants for genetic study: • There are many varieties with distinct heritable features, or ___________________ (such as flower color); character variants (such as purple or white flowers) are called __________________ • Mating of plants can be controlled • Each pea plant has sperm ...
... • Advantages of pea plants for genetic study: • There are many varieties with distinct heritable features, or ___________________ (such as flower color); character variants (such as purple or white flowers) are called __________________ • Mating of plants can be controlled • Each pea plant has sperm ...
Genetics Power Point
... Segregation of alleles during meiosis: • When the F1 plants produce gametes (sex cells) and self-pollinate, the two alleles for the same gene separate from each other so that each gamete carries only one copy of each gene. • Remember, gametes are haploid. In the example, we use “T” to represent the ...
... Segregation of alleles during meiosis: • When the F1 plants produce gametes (sex cells) and self-pollinate, the two alleles for the same gene separate from each other so that each gamete carries only one copy of each gene. • Remember, gametes are haploid. In the example, we use “T” to represent the ...
Dominance (genetics)
Dominance in genetics is a relationship between alleles of one gene, in which the effect on phenotype of one allele masks the contribution of a second allele at the same locus. The first allele is dominant and the second allele is recessive. For genes on an autosome (any chromosome other than a sex chromosome), the alleles and their associated traits are autosomal dominant or autosomal recessive. Dominance is a key concept in Mendelian inheritance and classical genetics. Often the dominant allele codes for a functional protein whereas the recessive allele does not.A classic example of dominance is the inheritance of seed shape, for example a pea shape in peas. Peas may be round, associated with allele R or wrinkled, associated with allele r. In this case, three combinations of alleles (genotypes) are possible: RR, Rr, and rr. The RR individuals have round peas and the rr individuals have wrinkled peas. In Rr individuals the R allele masks the presence of the r allele, so these individuals also have round peas. Thus, allele R is dominant to allele r, and allele r is recessive to allele R. This use of upper case letters for dominant alleles and lower caseones for recessive alleles is a widely followed convention.More generally, where a gene exists in two allelic versions (designated A and a), three combinations of alleles are possible: AA, Aa, and aa. If AA and aa individuals (homozygotes) show different forms of some trait (phenotypes), and Aa individuals (heterozygotes) show the same phenotype as AA individuals, then allele A is said to dominate or be dominant to or show dominance to allele a, and a is said to be recessive to A.Dominance is not inherent to an allele. It is a relationship between alleles; one allele can be dominant over a second allele, recessive to a third allele, and codominant to a fourth. Also, an allele may be dominant for a particular aspect of phenotype but not for other aspects influenced by the same gene. Dominance differs from epistasis, a relationship in which an allele of one gene affects the expression of another allele at a different gene.